Walls and Curtain Walls - Autodesk Revit Architecture 2015 Essentials - page 36

7. Next, locate the Base Constraint parameter. Change the value to
Level 2. The base constraint is the bottom of the wall. The base con-
straint can be changed at any time, and the wall will move to reflect
the change.
8. Locate the Base Offset parameter. Change the value to 1 ′- 0 ″ (300 mm).
The Base Offset or Top Offset is the value above or below the respec-
tive constraint (negative dimensions can also be used). For example,
if you wanted the bottom of a wall associated to Level 1 but 3′-0″
(1 m) below, the value for Base Offset would be -3′-0″.
9. Locate the Unconnected Height parameter. Change the value to
12 ′- 0 ″ (3655 mm). The Unconnected Height value is the height of
the wall when you do not use a specific datum for Top Constraint.
If you change the Base Constraint parameter back to Level 1
and then change the Top Constraint value to Up To Level: Level 2,
the Unconnected Height parameter becomes inactive.
editing and resetting Wall profiles
Not all walls are rectilinear in elevation, and for these situations you can edit
the profile of a wall. Note that you'll be able to edit the profile of a straight wall
only, not a curved wall.
When you edit a wall's profile, the wall is temporarily converted to an outline
sketch in elevation. Because the sketch is not plan based, you can edit a profile
only in a section, an elevation, or an orthogonal 3D view. You can draw as many
closed-loop sketches as you like within the wall's profile, but each loop must
be closed.
If you need to remove the edited condition of a wall, don't reenter Edit Profile
mode and manually remove the sketches. Select the wall, and click Reset Profile
in the Mode panel on the Modify | Walls tab. Doing so will reset the extents of
the wall and remove any interior sketches.
Another scenario for using Reset Profile would be when attempting to use
Attach Top/Base. Depending on how the wall profile was originally edited, Revit
could display a join error when attempting to attach the wall. This is most likely
to occur if the top of the wall profile was edited previously. Reset the profile first,
and then attempt to attach the wall to the roof as needed.
The objective of the following exercise is to edit the profile of a wall from a
rectangle to a custom shape and reset the profile at the end of the exercise.
Then you will continue with a second exercise using the Attach Top/Base tool